Over 50 tornadoes ripped through the mid-South on Tuesday night and Wednesday causing 58 deaths and widespread devastation. Some of the latest studies suggest that the cold Equatorial Pacific Ocean current, known as La Nina, may be at least partially to blame for this widespread outbreak of deadly destruction. According to the study, there are more tornadoes between fall and spring during La Nina years, which occurs once every few years. The study further showed that there is an increased chance of large tornado outbreaks (40 or more tornadoes associated with a single storm system) during La Ninas. In La Ninas, the cold tends to want to stay across the northern United States and strong warmth builds at times across the South. Storms along the boundary between the warm and cold feed on the contrast and severe weather often results.